#include<iostream>
#include<vector>
using namespace std;

int n, q;
const int N = 1e5 + 10;
vector<int> a[N];

int main()
{
    
    cin >> n >> q;
    while(q --)
    {
        int op, i, j, k;
        cin >> op >> i >> j;
        if(op == 1)
        {
            cin >> k;
            if(a[i].size() <= j)
                a[i].resize(j + 1);
            a[i][j] = k;
        }
        else
        {
            cout << a[i][j] << endl;
        }
    }
    return 0;
}